This Filson Mackinaw Wool Vest Liner Forest Green is the single most utilitarian piece of clothing you can own. And during the fall, winter, and early spring you can wear it nearly every day. Filson have a legendary reputation among hunters and outdoorsman for wool clothing that stays warm when wet, and holds up over time.

The Filson Mackinaw Wool Vest Liner has proven itself to be as versatile, functional and practical as any product Filson ever manufactured. There’s a very good reason it’s been a cornerstone in the Filson product line for more than half a century–it performs admirably in countless situations out of doors, or in.

This Wool Vest Liner provides warmth with minimal bulk, while maintaining excellent breathability–and does so even if it gets soaking wet. Worn over a warm shirt while actively chasing upland birds, it’s the perfect blend of warmth and breathability in temperatures down to near freezing. Worn zip-in in a rain shell, it takes the edge off when wading thigh-deep in an icy steelhead run. Under a Filson wool coat, it adds that extra bit of comfort in temperatures that can take your breath away.

The Mackinaw Wool Vest Liner is built with Filson warmest wool from the iconic Pendleton Woolen Mills, the same wool used in their Cruiser that’s provided protection from cold and wet conditions for over a century. Because Filson Mackinaw Wool is made with the fleece of sheep raised in the Pacific Northwest, naturally it’s the ideal wool to shield humans from soggy or frigid weather. With uncommonly-tight weave, it’s a formidable barrier to wind, and withstands tough use for decades. Due to its complex fiber structure, Mackinaw Wool also offers an unheralded benefit–it’s very simple to care for. Dried dirt brushes off with ease, leaving no trace of its existence. To remove odors, a dry Mackinaw Wool Vest can be tumbled in a warm dryer, and nearly always come out smelling fresh.

It has two hand warming pockets, which are great on a cold day because it means you don’t have to throw on a heavier jacket just to keep your hands warm when you head outside.